- Scientific American 1899-01-28 1210 visits
- Scientific American 1899-03-11 1240 visits
- Scientific American 1899-07-15 1267 visits
- Scientific American 1901-10-26 1313 visits
- Scientific American 1903-10-17 1528 visits
- Scientific American 1904-02-13 1241 visits
- Scientific American 1904-02-20 1296 visits
- Scientific American 1904-03-26 1170 visits
- Scientific American 1904-04-02 1208 visits